Nicholas Berdyaev on intolerance.
“The man, in whom intolerance reaches the point of flaming up, of fanaticism, is like a jealous person, and he sees everywhere only one thing, only the treason, the betrayal, only the breaking of fidelity to this single thing, he becomes suspicious and mistrustful, he discovers everywhere conspiracies against his beloved idea, against the object of his faith and love. The man fanatically intolerant, just like the jealous person, is very difficult to bring back to reality. The fanatic, obsessed with a maniac pursuit, sees all around the snares of the devil, but he is always the one who himself persecutes, torments and executes. The man, in the grip of a persecution mania, and who senses enemies all around him, — is a very dangerous being, he always becomes the persecutor, he it is that persecutes, rather than that they are persecuting him. “
– NICHOLAS BERDYAEV